Shadows over Innistrad Remastered

Mausoleum Wanderer | Creature | Spirit | Flying Whenever another Spirit enters the battlefield under your control, Mausoleum Wanderer gets +1/+1 until end of turn. Sacrifice Mausoleum Wanderer: Counter target instant or sorcery spell unless its controller pays {X}, where X is Mausoleum Wanderer's power. | Kieran Yanner

Falkenrath Gorger | Creature | Vampire Berserker | Each Vampire creature card you own that isn't on the battlefield has madness. The madness cost is equal to its mana cost. (If you discard a card with madness, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.) | Anna Steinbauer

Permeating Mass | Creature | Spirit | Whenever Permeating Mass deals combat damage to a creature, that creature becomes a copy of Permeating Mass. | Joseph Meehan